CVE-2022-1922

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2022-07-19 · updated 2026-06-17
Weakness: CWE-122

Description

DOS / potential heap overwrite in mkv demuxing using zlib decompression. Integer overflow in matroskademux element in gst_matroska_decompress_data function which causes a segfault, or could cause a heap overwrite, depending on libc and OS. Depending on the libc used, and the underlying OS capabilities, it could be just a segfault or a heap overwrite. If the libc uses mmap for large chunks, and the OS supports mmap, then it is just a segfault (because the realloc before the integer overflow will use mremap to reduce the size of the chunk, and it will start to write to unmapped memory). However, if using a libc implementation that does not use mmap, or if the OS does not support mmap while using libc, then this could result in a heap overwrite.

Affected products

Debian Linux: 10.0, 11.0
GStreamer: before 1.20.3 — fixed in 1.20.3

How to fix

Upgrade to a fixed version: GStreamer 1.20.3. Check the vendor advisory for mitigations.

References

Get alerted when CVE-2022-1922 or the next vulnerability affects your stack